Help me out here, who do you think experienced the most suicidal ideation, desert Ben, Vader pre-ANH, or Vader post-ESB?
Oh, dude LOL it’s a tough call but I’ll have to say pre-ANH Vader.
Desert Ben and post-ESB Vader at least had a sense of purpose involving something positive (Luke). Despite all their suffering, trauma and depression they had some hope left.
Desert Ben was driven by duty. He was suffering but he put his mission above himself. As much as he wanted to give up, he couldn’t because he needed to protect Luke and guide him to save the Galaxy. He probably saw in Luke a change to right some wrongs of his past. To succeed where he had failed with Anakin. and Obi-wan, being a man who wants to be good more than anything, would put saving Luke and galaxy above his own feelings and interests. Besides, I have feeling suicide would be something the Jedi would see as the ultimate selfish act. So even considering suicide would be a big NOPE for Obi-wan. Bury it all up and keep on going, that’s the Jedi way.
Post-ESB Vader was rejected by his son but he didn’t give up. He still had a little hope left for Luke. It was twisted sense of family and love but it was more than anything he had in long time.
Vader was a mess. This Vader has nothing. Nothing to go back and nothing to
look forward to. He had nothing positive in his life. Everything that drove involved
negative emotions and situations. Pre-AHN Vader, especially in the first few
years after ROTS, was at his most self-destructive phase. He hate everything, everyone
and himself above all else. Post-ESB Vader at least knew there was something
good left of him in the world.
Old Ben and post-ESB!Vader also had some sense of self-preservation. Pre-ANH Vader gave zero fucks about himself.